Screen



(N0.Mode1.) I 2 Sheets-Sheet 1.

P. B. MATHIASON."

SCREEN. No. 366,443. Patented June 28, 1887.

i o o l l I I N, PETERS, Phokrlimampher. Wuhington.

2 Sheets-Sheet 2.

N.. 0 S H T A M B R SCREEN.

Patented June 28, 1887,

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UNITE STATES PATENT OFFICE.

PETER B. MATHIASON, or sr. LOUIS, MISSOURI.

SCREEN.

SPECIFICATION forming part of Letters Patent No. 365,443, dated June 28, 1887.

Application filed June 28,1886. Serial No. 206,476. (No model.)

To all whom it may concern:

Be it known that I, PETER B. MATHIASON, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement inScreens, of which the following is a full, clear, and exact description, reference being had to the accompanying draw ings, forming part of this specification, and in which- Figure 1 is a top view of my improved screen with the hopper removed. Fig. 2 is a side elevation of the machine, part of the hopper being broken away. Fig.3 is a transverse section taken on line 3 3, Fig. 1, being also made through the hopper, as well as through the part of the machine shown in Fig.

1. Fig. 4 is an enlarged detail view of the screen-bed; and Figs. 5 and 6 are transverse sections taken on lines 5 5 and 6 6, respectively, Fig. 4. Y

My invention relates to a machine intended more particularly for screening clay and like substances; and my invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Referring to the drawings, A represents the frame of the machine, supporting in suitable boxes, B, a shaft,- B, provided with a drivingpulley, 13 On this shaft are arranged a number of conveyer-blades, O, the blades being preferably secured to the shaft by means of plates 0, there being a plate for each two oppositely-located blades, as shown in Fig. 3. Theplates are secured to the shaft by means of a feather or any suitable means, so as to be made to turn with it and cause the blades to revolve, as indicated by the arrow in Fig. 3. The outer ends of the blades are turned at an angle to their inner ends, as shown in Fig. 1; and they are so arranged that the outer rear part of one blade passes over the line of the screen traversed by the advanced edge of the blade immediately preceding it, so that the en- I tire surface of the screen is worked upon by to pass through the meshes of the screen. I have shown the blades secured to the plates 0 by means of bolts 0.

The screen Dis preferably composed of wiregauze, but may be made of perforated metal or any other suitable material. It is supported by bars or plates E, secured to the frame A at E, and to which the screen is secured at intervals by wires F, that pass through the screen and embrace or surround the plates.

The plates are placed at any suitable distance apart, and are held in place relatively to each other by connecting-rods G and sleeves H, the

are preferably enlarged at the. rod-holes, as

shown at I, to give them additional strength.

shown at J, Figs. 3, 4, 5, and 6, and in order to still furthewprevent the retarding of the passage of the material I prefer to cut away the plates, as shown at L, so that the main part of each plate is removed from the screen, the screen resting upon the parts of the plates between the notches L. The passage of the material through the screen is indicated by the featherless arrows in Figs. 2 and 3, and the discharge of the materialwhich is too coarse to pass through the screen is indicated by dotted arrow in Fig. 2. The material to be screened is discharged into a hopper, M, located over the blades 0 and screen, as shown in Fig. 3. 1

This machine (as before stated) is intended more particularly for screeningclay for such may be used for other purposes-as, for instance, screening sand or other material.

I claim as my invention- 1. A screen constructed substantially as herein described, consisting of a frame, a series of curved plates, suitable screening material placed thereon, and means for securing said screening material directly to the inner faces \of said curved plates, substantially as set forth.

2. The combination, with the frame and the rotary shaft journaled therein and having agitating-blades, of the curved plates supported by said frame, suitable screening material, and means for securing said screening material directly to the inner faces of said plates, substantially as set forth,

3. The combination of the frame, the screen, and the plates supporting the screen, said plates being recessed and formed with knifeedges, substantially as and for the purpose set forth.

4. The combination, with the frame, the curved plates supported thereby, and the screen resting upon said plates, of the rods passed through perforations in the plates, and

the sleeves surrounding the rods between the 15 plates for holding the latter against displacement, substantially as set forth.

The combination of the frame, the screen, and the plates supporting the screen, said plates being formed with notches L, substan- 2o tially as and for the purpose set forth.

, PETER B. MATHIASON.

In presence of- GEo. H. KNIGHT, EDW. S. KNIGHT. 

